Sidebar 2 problem

I just reinstalled my WordPress theme called D’Computers 1.0 by D’. I noticed that there were 2 extra items (categories, and links) on my sidebar 2. I removed all widgets from sidebar 2, but those 2 are there. I wonder what php file that could possibly control the sidebar 2? By the way, I tried it with a different WordPress theme, but no success. What is your suggestion to fix this problem?

Let me reiterate this problem. After I reinstalled it, I noticed that there were more widgets than what there were supposed to. Then I removed all the widgets that I added. There I found that there were 2 that I did not add. Something weird did happend after reinstalled the theme, D’Computers 1.0. What is the culprit behind this strange thing?